Since its winter and some of us don't have heated garages,what is the coldest temp in your garage that you have worked in on your race car?I changed the motor in my Camaro last month when it was 25-40 during that week.
Same here upper 30's just long sleave shirt, lower than that I fire up the propane heater , thats depending on what I am doing.I find I don't need the heat if it's upper 30's. Below that I'll run the heat for a while.